In fast food restaurants, guests help themselves to salad from a salad bar.
A.
正确
B.
错误
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【单选题】The ship ( ) the agreed voyage and arrived about 10 days late and in the meantime the price of sugar had fallen and the merchants lost much money.
【判断题】Put option is the option buyer has the right to purchase certain foreign exchange assets stipulated in the option contract at the agreed price on or before the expiration date.